A subatomic particle with a positive charge located in the nucleus

An atom's central region, which is made up of protons and neutrons is

A region around the nucleus of an atom where electrons are likely to be found is

The number of protons in an element; all atoms of the element have the same one

The sum of the numbers of protons and neutrons in the nucleus of an atom is

Mendeleev's arrangement of the elements

The weighted average of the masses of all the naturally occurring isotopes of that element.

An abbreviation for the element's name is

Elements that are shiny and conduct heat and electricity well.

Elements that have some properties of metals and some properties of nonmetals.

Are poor conductors of heat and electricity.

Each horizontal row of elements(from left to right) on the periodic table is called a

Each vertical column of elements (from top to bottom) on the periodic table is a called a

A subatomic particle that has a negative charge is